55257400 has 48 divisors (see below), whose sum is σ = 140158440. Its totient is φ = 20092800.

The previous prime is 55257359. The next prime is 55257401. The reversal of 55257400 is 475255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55257401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10359 + ... + 14758.

Almost surely, 2^55257400 is an apocalyptic number.

55257400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55257400 is an abundant number, since it is smaller than the sum of its proper divisors (84901040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55257400 is a wasteful number, since it uses less digits than its factorization.

55257400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25144 (or 25135 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 28.

The square root of 55257400 is about 7433.5321348603. The cubic root of 55257400 is about 380.8875835723.

The spelling of 55257400 in words is "fifty-five million, two hundred fifty-seven thousand, four hundred".